No Particular order. Inputting as I use/remember. Some are free while others are not.
HOMESCHOOL RELATED:
Videos:
http://www.californiastreaming.org/
Math:
http://www.whizz.us/
http://www.kosjourney.com/
http://www.khanacademy.org/
http://www.thinkwell.com/
Computer Programming/Animation:
http://scratch.mit.edu/
Reading:
http://www.bookadventure.com/Home.aspx
Writing:
http://www.writeguide.com/
Multiple Subjects:
http://www.time4learning.com/